1 /*

     2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP

    26 #define SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP

    27 

    28 #include "jvmtifiles/jvmti.h"

    29 #include "memory/allocation.hpp"

    30 

    31 class JvmtiManageCapabilities : public AllStatic {

    32 

    33 private:

    34 

    35   // these four capabilities sets represent all potentially

    36   // available capabilities.  They are disjoint, covering

    37   // the four cases: (OnLoad vs OnLoad+live phase) X

    38   // (one environment vs any environment).

    39   static jvmtiCapabilities always_capabilities;

    40   static jvmtiCapabilities onload_capabilities;

    41   static jvmtiCapabilities always_solo_capabilities;

    42   static jvmtiCapabilities onload_solo_capabilities;

    43 

    44   // solo capabilities that have not been grabbed

    45   static jvmtiCapabilities always_solo_remaining_capabilities;

    46   static jvmtiCapabilities onload_solo_remaining_capabilities;

    47 

    48   // all capabilities ever acquired

    49   static jvmtiCapabilities acquired_capabilities;

    50 

    51   // basic intenal operations

    52   static jvmtiCapabilities *either(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result);

    53   static jvmtiCapabilities *both(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result);

    54   static jvmtiCapabilities *exclude(const jvmtiCapabilities *a, const jvmtiCapabilities *b, jvmtiCapabilities *result);

    55   static bool has_some(const jvmtiCapabilities *a);

    56   static void update();

    57 

    58   // init functions

    59   static jvmtiCapabilities init_always_capabilities();

    60   static jvmtiCapabilities init_onload_capabilities();

    61   static jvmtiCapabilities init_always_solo_capabilities();

    62   static jvmtiCapabilities init_onload_solo_capabilities();

    63 

    64 public:

    65   static void initialize();

    66 

    67   // may have to adjust always capabilities when VM initialization has completed

    68   static void recompute_always_capabilities();

    69 

    70   // queries and actions

    71   static void get_potential_capabilities(const jvmtiCapabilities *current,

    72                                          const jvmtiCapabilities *prohibited,

    73                                          jvmtiCapabilities *result);

    74   static jvmtiError add_capabilities(const jvmtiCapabilities *current,

    75                                      const jvmtiCapabilities *prohibited,

    76                                      const jvmtiCapabilities *desired,

    77                                      jvmtiCapabilities *result);

    78   static void relinquish_capabilities(const jvmtiCapabilities *current,

    79                                       const jvmtiCapabilities *unwanted,

    80                                       jvmtiCapabilities *result);

    81   static void copy_capabilities(const jvmtiCapabilities *from, jvmtiCapabilities *to);

    82 

    83 #ifndef PRODUCT

    84   static void print(const jvmtiCapabilities* caps);

    85 #endif

    86 };

    87 

    88 #endif // SHARE_VM_PRIMS_JVMTIMANAGECAPABILITIES_HPP